此生谁料
[cĭ shēng shéi liào]
This username can be understood as 'Unpredictable Life'. '此生谁料 (cǐ shēng shuí liào)' refers to the unpredictability and uncertainties one may encounter in his or her lifetime, and indicates the user acknowledges they can never tell what might happen next in life. It could also have an aspect of fatalism.